Man pages for CambridgeAssessmentResearch/unimirt
Applications of Unidimensional IRT using the R Package 'mirt'
| a104apps | Pick an interative shiny app to launch |
| alfunc | Cronbach's alpha. |
| augmentdata | Augment existing item data |
| ChooseItems | Select items to maximise the sum of sum particular variable... |
| CSEMfromMirt | Function to calculate conditional standard error of... |
| CSEM_scale_function | Calculate the Conditional Standard Error of Measurement... |
| dexter.to.unimirt | Convert IRT model fitted using fit_enorm (from dexter... |
| dichotomous.to.pcm | Convert Rasch difficulties of many dichotomous items to... |
| DifficultyPlot | Compare difficulty parameters across items |
| EmpiricalICCfit | Create a ggplot of empirical item characteristic curves... |
| EmpiricalICCfitV1 | Subroutine for empirical item characteristic curves |
| EstimatedItemDistribution | Estimate the score distribution for an individual item in a... |
| ExpectedScoreCompare | Plot comparing expected total scores on common items between... |
| extractGroup | Extract single group mirt object from a multiple group one |
| FindBestRabils | Function to estimate how big the R_rest values for a set of... |
| GetDataFromMirt | Function to extract the (non-fake) item data set from a mirt... |
| InformationLocation | Location of each item's maximum information |
| ItemParameterCompare | Plot comparing item parameters for common items |
| itemplotdata | Create list of data sets used in typical IRT plots |
| JointAbilityScoreDist | Create joint distribution of true scores (i.e., theta) and... |
| mathsdata | Simulated item score data |
| MirtCombine | Combine two estimated IRT models into a single object |
| MirtEAPs | Function to extract EAP ability estimates from a mirt object |
| MirtHaebara | Estimate Haebara transformation between two mirt objects and... |
| MirtObjectRecalibrate | Use the Stocking-Lord procedure to recalibrate ome mirt... |
| MirtStockingLord | Estimate Stocking-Lord transformation between two mirt... |
| MirtSubset | Create a mirt object based on a subset of items in another... |
| MirtTidyCoef | Get table of item parameters |
| MirtTidyCoefSE | Get table of item parameters with standard errors |
| MirtToClassical | Get table of classical item statistics for data in a "mirt"... |
| MirtToEstimatedClassical | Estimate classical item statistics for data in a "mirt"... |
| MirtUniPVs | Function to create plausible values from a mirt object |
| ParComparePlot | Plot comparing item parameters |
| pcm.to.dichotomous | Convert Partial Credit Model (PCM) thresholds to equivalent... |
| rbind_all.columns | Function to stack two data frames and keep all the columns |
| runClassicalApp | Launch interactive shiny app to perform some simple classical... |
| runClassicalEquatingApp | Launch interactive shiny app to perform some simple classical... |
| runItemSelectionApp | Launch shiny app to facilitate item selection |
| runMirtCompareApp | Launch shiny app to compare estimated IRT objects |
| runResultsApp | Launch shiny app to view IRT results |
| ScoreDistFromMirt | Function to estimate sum score distribution for a selection... |
| SlopePlot | Compare slope parameters across items |
| tam.jml.to.unimirt | Convert IRT model fitted using tam.jml (from TAM package) to... |
| TCClookup | Lookup ability values on the test characteristic curve |
| ThurstonianThresh | Thurstonian thresholds |
| unimirt | Wrapper for "mirt" to facilitate fitting unidimensional... |
| unimirt.plot | IRT plots |
